Back when we used to ride motorcycles, we'd use throat mikes to communicate. There's an ear bud you put in either ear to hear and a thin strap that goes around your neck that picks up on vibrations in your throat for communications. Just remember not to talk loud or no one will be able to understand you.

You get mixed reviews with them. The truth is that for the most part, people don't understand how to use them. You talk low and slow, like you're carrying on a regular conversation. People talk louder because they think the radio won't pick them up, which makes them fuzzy and bad sounding, then they talk even louder thinking it's like a regular microphone, which makes it worse.

You can find them in police supply places and motorcycle shops. A lot of SWAT teams use them because you can hear people when they whisper. Bikers like them because there's no wind noise and you don't have to shout to overcome the sound of your bike/tires/road/etc.

Either of those places will probably let you demo a couple while in the shop to see how you like them.

Great lead! Thanks. The only reason I haven't ordered some this evening is that I'm not sure how they'd do with exertion level breathing, although a decent push-to-talk that we can put on the handlebars or on a finger (some of the models I've seen have a "velcro the button to your finger" attachment) might make even that okay.

If we can get an ear piece that does something reasonable with wind noise (unlike motorcycle helmets we don't have coverage over the ears) that'd be an awesome solution.